Abstract: The basic bubble cap assembly for sealing a hole in a tray deck for example, comprises an inner tubular sleeve having a lower flanged end telescopic with the inner surface of a tubular riser having a lower flanged end, and gasket means for sealing the lower flanged ends of both the telescopic tubular riser and the inner tubular sleeve to the upper and lower peripheral surfaces around the hole for providing a double seal between the tray deck and the bubble cap assembly, for minimizing leakage, and for assuring proper alignment of the bubble cap assembly relative to the tray deck. Three modifications are disclosed. One comprises a spider secured on the lower end of the hold-down stud for placing it in tension for compressing the two sealing gasket means. A second embodiment comprises a hold-down stud lower end fastened to a cross bar which is welded to the internal surfaces of the inner tubular sleeve.

Abstract: An improved liquid aerating rotor assembly comprises a support frame having a rotor mounted for rotation about a horizontal axis. A plurality of floats support the rotor and support frame on the surface of a sewage pond or the like. A V-shaped deflecting plow or V-shaped front float is located upstream of the rotor. This configuration causes the upstream surface layer of liquid to pass around the rotor. This prevents any solid debris located in the surface layer of liquid from jamming the rotor and allows more complete aeration of sub-surface liquid. Alternatively, a scoop may replace the V-shaped deflecting members.

Abstract: A compact apparatus for removing harmful particulate contaminants from the air in a work space includes a nozzle for atomizing water. The nozzle is connected to a supply of compressed air and to a supply of water, e.g., an ordinary water tap or storage tank. The apparatus also includes a metal ring and a power supply coupled to the ring to charge atomized water inductively as the water is expelled from the nozzle. A collar supports the ring in fixed, spaced-apart relation adjacent the nozzle. The collar is constructed, at least in part, from a non-conductive plastic, such as nylon, to avoid shorting of the power supply. Additionally, the collar includes a compressed air supply passage for introducing a stream of air into the collar. This air flows past the nozzle and the ring to prevent accumulation of water on the ring and collar and the electrical shorting which may result therefrom.

Abstract: An apparatus for removing oil mist includes a cylindrical main body having an air inlet at one end and an air outlet at the other side thereof. A cylindrical rotatable filter having one end open to the air inlet and a centrifugal fan disposed concentrically within the filter and rotatable therewith are positioned within the main body. An oil adsorbent layer is provided on the inner surface of the main body surrounding the filter. The air taken in through the air inlet is passed through the filter into the air outlet causing air-borne oil mist to adhere to the filter. That oil mist which coalesces on the filter is centrifugally forced outward, is adsorbed by the oil adsorbent layer, and thereafter travels through the oil absorbent layer for discharge through an oil drain channel.

Abstract: A screening apparatus for fiber suspensions comprising a stationary cylindrical screen one side of which is in flow communication with the inlet for the fiber suspension and the other side, from which the accepted stock emerges, forming an annular space with a rotor comprising a cylindrical wall having elevations for producing positive and negative pressure thrusts serving to keep the screen clear and openings behind the projections through which some of the accepted stock passes to provide an alternative path to the outlet for the accepted stock.

Abstract: A rotary screen appliance for the sifting of sand at a construction site is fittable directly to the mouth of a motorized driving device such as a cement mixer. A dismantable screen cage is connected to an armature preferably having three guide arms. A fastening portion is slidably attached to each guide arm and extends at an acute angle therefrom such that the fastening portions may engage the mouth of a cement mixer and thereby lock the screen cage thereto. Rotation of the cement mixer causes rotation of the screen cage. A device for rapping on the screen cage and thereby shaking it as it rotates is also provided.

Abstract: A pair of screens are arranged one behind the other and served by a common cleaning rake for the removal of the screenings from both screens in a single operating step.

Abstract: An improved procedure is disclosed for the electrostatic precipitation of particulates entrained in a stream of gas between corona electrodes and collecting electrodes. The underlying dc field which serves to charge the particulates and transport them out of the stream is relatively uniform and therefore can be relatively high, while the corona which is required to yield ions to charge the entrained particulates is provided by a high repetitively pulsed electric field between the corona electrodes and the collecting electrodes. Embodiments are presented which suggest the manner in which conventional precipitators may be adapted to the present invention.

Abstract: Simple, flow regulating tap-off means are provided in the bottom of a helical eluent supply conduit which is co-axial with a helical separator sluice in a gravitational separator. The tap-off means is an insert in the floor opening of the eluent conduit having an aperture in the insert and an inner lip at the top of the insert that does not extend above the floor of the eluent conduit. A portion of the inner lip is broken away to facilitate directing the eluent to flow through the aperture. Rotating the insert varies the amount of the broken away portion in contact with the downward flowing eluent which in turn regulates the amount of eluent flow through the aperture.

Abstract: A flow preconditioner for an electrostatic precipitator which removes particulate matter from a stream of polluted gas immediately after it passes through a tangential inlet at the lower end of a vertical cylindrical housing and straightens and divides the stream into laminations parallel to the axis of the housing. It comprises an annular ledge or choke ring extending inwardly from said housing above the inlet and an assembly of vanes above said ledge extending radially from the axis of the housing and angularly spaced apart. Each of said vanes has a flow receiving edge directed toward said inlet, a curved portion extending upwardly and away from said inlet, and a flat portion extending upwardly from said curved portion in a plane parallel to the housing axis.

Abstract: A cylindrical cartridge having a housing containing a replenishable water supply is employed as a water supply source for producing an aerosol with an oxygen stream for inhalation therapy through the agency of a nebulizer adapter which couples pressurized oxygen to the water cartridge. A venturi-type insert member is disposed vertically with the cartridge. The venturi draws water from the water supply and directs atomized droplets of water and oxygen into a mixing chamber located above the water level in the cartridge. The cartridge has a vertical tubular portion with a connection to a source of oxygen or air and terminates above the level of the water in the cartridge. The aerosol flows out of the cartridge through an outlet nozzle. The cartridge is an elongated housing having a capillary active cylindrical absorption surface means internally whereby water is drawn up along the cartridge's cylindrical body wall which serves as an evaporating surface.

Abstract: A filter assembly to remove impurities from a pressurized fluid stream comprises:(a) a longitudinally elongated barrel, first and second end structures at opposite ends of the barrel, said structures including end caps, and elongated tie members spaced about the barrel and removably interconnecting said end caps,(b) the barrel adapted to receive flexible container means containing fluid stream filtering material, and a spring located within the barrel between one of said end structures and said flexible container means to pressurize the latter for expanding same sidewardly against the barrel, and(c) the first end structure containing a fluid inlet and an annular plenum communicating with said inlet, said first end structure having an annular wall extending about a cavity in endwise longitudinal alignment with the barrel interior, said plenum extending about said wall which contains multiple through openings angled to pass pressurized fluid from the plenum to the cavity in sub-flow streams which are caused to

Abstract: A device for bubbling gas into a liquid; means are provided at the point of exit of the bubbles from the device to provide a liquid flow that sweeps the bubbles into the liquid, thereby provoking early detachment of the bubbles from the device.

Abstract: A clear air device to maintain the cleanliness of air in "clear rooms" and to ventilate said rooms has a casing with an air inlet grid and an air outlet grid, a preliminary filter, a ventilator and a high efficiency particulate air filter unit (HEPA). The preliminary filter, the ventilator and the high efficiency filter are arranged within the casing in such an order that the air drawn in through the inlet grid first passes said preliminary filter, then the ventilator and thereafter the HEPA. The wall of the casing is provided with one opening between the air inlet grid and the preliminary filter and one opening between the HEPA and the air outlet grid.

Abstract: A vapor-liquid contacting tray is disclosed having an enclosure member overlying and extending transversely across the tray deck top surface from a portion above a tray support ring to an adjacent perforated portion of the tray deck wherein the perforation openings are unobstructed by the support ring. A vapor flow opening is located in the enclosure member over the portion of the tray deck above the support ring. Vapor flowing into the enclosure member from the overlaid tray deck perforation openings is directed through the vapor flow opening into the liquid on the tray deck surface portion overlying the support ring, to effect vapor-liquid contacting and prevent liquid flow stagnation thereon.

Abstract: A humidification apparatus including a housing, a fan assembly mounted in the housing and having conduits extending therein, a slinger assembly rotatably mounted in the housing adjacent to and coaxial with the fan assembly and having vanes on a surface thereof, and water feed means for delivering water through the conduits in the fan assembly to the surface of the slinger assembly.

Abstract: A room air cleaner draws ambient air beneath a freely swinging baffle suspended above a liquid bath. As the air passes beneath the baffle, it is directed toward the surface of the bath. The momentum of the solid particles within the ambient air carries the particles into the bath where they are trapped and maintained. The air is then drawn through a filter element and subsequently exhausted into the room. An anti-splash screen prevents entrained liquid from being exhausted along with the stream of filtered air, while a separate reservoir together with a float valve mechanism may be utilized to maintain the liquid bath at a constant level, offsetting any liquid evaporation.

Abstract: A filter element support assembly for use with hollow, cylindrical, pleated media filter elements is disclosed. The filter elements are placed on the support in end-to-end abutting relationship. The support includes a plurality of baffle plates in parallel spaced relationship, which isolate the interior chamber of each filter element from those of the support assembly into the interior chambers of the filter elements. The tubes are not only the primary structural members of the assembly, but also serve the dual function of providing a means of fluid communication between each isolated filter element chamber and a clean air plenum and source of compressed air, and of guiding and positioning the filter elements in their proper locations.

Abstract: A rotating separator removes air coating from pigmented paper coating liquid stock. The separator employs a cylindrical tank which is mounted for rotation about a vertical axis. The separator is operated in a filled condition and an air laden or froth fraction is removed from a radially central region of the tank at the top of the tank, while a non-rotating pickup receives air free coating from a region adjacent the wall of the tank near the tank bottom. A method of treating and applying such a coating includes the steps of pumping an air laden coating into a centrifugal separator while maintaining the separator in a filled condition, removing an air froth from the separator for return to the supply tank, and delivering a substantially air free coating directly to the inlet of a control without the imposition of any intermediate pumping apparatus. The centrifugal pumping action of the separator supplements the pressure head on the coating material.

Abstract: A screening machine (FIG. 3) having a vibrator constructed so that the striking elements 7 move substantially only vertically. The vibrator comprises springs having crossing elements 2,3 mounted on the frame and connecting member 4. The connecting member 4 can be moved to rotate the striking elements about the crossing point D of the crossing elements, which is disposed substantially in the plane of the spring.